Clark, Brian LeeFranklin, MelissaHuth, JohnIppolito, ValerioLazovich, TomoLopez Mateos, DavidMercurio, KevinMorii, MasahiroSpearman, WilliamSun, SiyuanTolley, EmmaTuna, AlexanderYen, AndyZambito, Stefano2017-06-082016Aad, G., B. Abbott, J. Abdallah, O. Abdinov, R. Aben, M. Abolins, et al. 2016. Search for the production of single vector-like and excited quarks in the Wt final state in pp collisions at s√ = 8 TeV with the ATLAS detector.” Journal of High Energy Physics 2016 (2) (February). doi:10.1007/jhep02(2016)110.1029-8479http://nrs.harvard.edu/urn-3:HUL.InstRepos:32939658A search for vector-like quarks and excited quarks in events containing a top quark and a W boson in the final state is reported here. The search is based on 20.3fb−1 of proton--proton collision data taken at the LHC at a centre-of-mass energy of 8 TeV recorded by the ATLAS detector. Events with one or two leptons, and one, two or three jets are selected with the additional requirement that at least one jet contains a b-quark. Single-lepton events are also required to contain at least one large-radius jet from the hadronic decay of a high-pT W boson or a top quark. No significant excess over the expected background is observed and upper limits on the cross-section times branching ratio for different vector-like quark and excited-quark model masses are derived. For the excited-quark production and decay to Wt with unit couplings, quarks with masses below 1500 GeV are excluded and coupling-dependent limits are set.en-USExoticsHadron-Hadron scatteringJournal Article10.1007/JHEP02(2016)110